Venous Duplex Ultrasound
(Venous Duplex Study; B-mode Imaging)
An ultrasound uses sound waves to create images of the inside of the body. A venous duplex ultrasound is an ultrasound that looks at the flow of blood through the veins in the arms or legs.
Reasons for Test
The test may be used for the following reasons:
To investigate the cause of the following symptoms in an arm or leg:
- Increased warmth
- Bulging veins
To diagnose the following:
- A blood clot, like deep vein thrombosis (DVT)
- Poor vein function
Deep Vein Thrombosis
There are no major complications associated with this procedure.
What to Expect
Description of Test
You will be asked to lie on a table. Gel will be placed on the skin of your arm or leg, over the veins being tested.
The ultrasound machine has a hand-held instrument called a transducer, which looks like a microphone or wand. The transducer is pushed against your skin where the gel was applied. The transducer sends sound waves into your body. The waves bounce off structures in the body and echo back to the transducer. The echoes are converted to images that are shown on a screen. The doctor examines the images on the screen. He may make a photograph of them as well.
The technologist may push the probe firmly or softly against your skin in order to better see the vein and to see if it collapses under pressure.
How Long Will It Take?
The length of the test varies, depending on your situation. In most cases, it will take between 15-45 minutes.
Will It Hurt?
In general, this test is not painful. You may feel some mild discomfort as pressure is applied to your arm or leg.
Call Your Doctor
After the test, call your doctor if any of the following occurs:
- Your symptoms continue or worsen
- You develop any new symptoms
If you think you have an emergency, call for medical help right away.
Family Doctor—American Academy of Family Physicians
Radiology Info—Radiological Society of North America
Canadian Cardiovascular Society
Deep vein thrombosis (DVT). EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamed. Updated May 5, 2014. Accessed May 7, 2014.
Matic PA, Vlajinac HD, et al. Chronic venous disease: Correlation between ultrasound findings and the clinical, etiologic, anatomic and pathophysiologic classification. Phlebology. 2014;29(8):522-527.
Ultrasound—venous (extremities). Radiological Society of North America Radiology Info website. Available at: http://www.radiologyinfo.org/en/info.cfm?PG=venousus. Updated August 27, 2013. Accessed May 7, 2014.
Venous ultrasound of the legs (lower extremity doppler). Harvard Health Publications. Available at: http://www.health.harvard.edu/diagnostic-tests/venous-ultrasound-of-the-legs.htm. Accessed May 7, 2014.
Last reviewed January 2015 by Michael J. Fucci, DO
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.